218505483306 has 128 divisors (see below), whose sum is σ = 533960294400. Its totient is φ = 65684520000.

The previous prime is 218505483263. The next prime is 218505483307. The reversal of 218505483306 is 603384505812.

218505483306 is a `hidden beast` number, since 21 + 8 + 50 + 548 + 3 + 30 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (218505483307) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44131131 + ... + 44136081.

It is an arithmetic number, because the mean of its divisors is an integer number (4171564800).

Almost surely, 2^218505483306 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218505483306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266980147200).

218505483306 is an abundant number, since it is smaller than the sum of its proper divisors (315454811094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218505483306 is a wasteful number, since it uses less digits than its factorization.

218505483306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5553 (or 5547 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 218505483306 in words is "two hundred eighteen billion, five hundred five million, four hundred eighty-three thousand, three hundred six".